Spray Tank Mix Calculator
Works out what goes in each tank when a label rate is given per area. The label is the legal and safe rate, so take the rate from there.
Share sends a link that reopens these numbers. Copy details pastes the full breakdown as a list.
The formula
area per tank = tank volume ÷ water volume per area product per tank = label rate × area per tank
The product goes on per area, so the water volume only sets how far each tank goes, not how much product lands on the crop.
What to watch out for
Calibrate the sprayer first: the water volume here must match what it actually applies at your speed and pressure, or the product rate on the ground will be wrong. Mix the part tank last, and only as much as the rest of the field needs. For a rate per litre of water, use the pesticide dilution calculator.
Frequently Asked Questions
Does more water mean more product per hectare?
No. Only the area per tank changes. The product per hectare stays at the rate you put in, as long as each tank is mixed to match.
How is a part tank worked out?
From the spray still needed. The field needs area × water volume in total, and whatever is left after the full tanks gets product in the same proportion.